Gravitational field of scalar lumps in higher-derivative gravity
Abstract
We study the gravitational field sourced by localized scalar fields (lumps) in higher-derivative theories of gravity. By working in a static and spherically symmetric configuration, we find the linearized spacetime metrics generated by scalar lumps for several Lagrangians: the vanishing potential, i.e. free massive scalar field, a polynomial potential, and the tachyon potential in open string field theory. We perform the analysis for different theories of gravity: Einstein's general relativity, four-derivative gravity, and ghost-free nonlocal gravity. We discuss the limit of validity of our analysis and comment on possible future applications in the context of astrophysical compact objects.
Keywords
Cite
@article{arxiv.2103.14313,
title = {Gravitational field of scalar lumps in higher-derivative gravity},
author = {Luca Buoninfante and Yuichi Miyashita},
journal= {arXiv preprint arXiv:2103.14313},
year = {2021}
}
Comments
21 pages, 6 figures. V2: version accepted for publication in PRD